Multilayer Microstrip Antennas Array Operating in Dual Bands

The paper describes problems related to antenna technology. The paper shows the construction of multilayer microstrip antenna array on a dielectric substrate operating in dual band (2.4GHz and 5.8GHz). Microstrip antennas in antenna technology appeared relatively late, but in recent years there has been a large development of the design of these antennas and a huge interest in their capabilities. Microstrip antennas are often used in all areas of radio communications. This is due to the simplicity of their design, easiness of implementation and relatively low production costs. An important advantage of these antennas is their shape, small size, low weight and aesthetic appearance. Microstrip antennas also provide high repeatability parameters and high resistance to weather conditions. The article presents two arrays (2£1 and 4£1) of microstrip antennas operating at frequencies of 2.4GHz and 5.8GHz. To the feed microstrip arrays we used parallel feed conflguration. The distance from the input port to each radiating element is identical. For a uniform aperture distribution, the power is equally split at each junction. In this antenna two operating frequencies have the same polarization planes. The antenna consists of three layering and has two rectangular radiating elements on difierent layers.